DoctorNick

So if its the case, that you get more lag when installing more fans, then you need to check your cabling and or seating of the motherboard. Also test without any power adaptors and directly to different power outlets. If motherboard or any bare plugs is touching the case, you might have a grounding issue, affecting the PWM signal to the fans, causing lag to the whole system. After checking cabling, be sure that ram is installed in slot A2 B2 and expo is disabled. Any overclock/undervolt is disabled while testing. Also while you're at it, download HWinfo64 and check temperatures of CPU and GPU.

Yes bottleneck calculators are useless. Its a fine setup

If you already got 3 NF-A12x25, then why not just get 3 more as intake? Or take one of the exhaust fans and put in front with 2 additional for positive airflow.

Limits and curve optimizer is the only thing you need to set. You can try with limits set to disable, if that doesn't work, test with motherboard. On my board, I exceed the predefined limits when disabling it:

True, supports USB flashing, totally forgot that, nevermind getting rev. 2 then

You can't anymore. Back in the good ol' days, they printed the version on the box, but not anymore. Instead try getting a rev. 2.0 instead og rev.1.x. Rev.2.0 supports 14th gen from the factory bios: https://www.gigabyte.com/Motherboard/Z790-GAMING-X-AX-rev-20/support#support-cpu

Make sure CPU sites correctly in socket, I would check for bent pins. Close the lid and make sure it sits correctly before closing the arm.

Did you fresh install or update? Either way, try this:

GJ! This is way better than I expected. Linus check this out - content for WAN show @LinusTech

You loose WIfi connection? If this is the case, go into settings on the access point and change channels. The IP interference you suggest doesn't make any sense

This, thats why its a good idea to let them know before sending it in

If anything, this is the creators choice..

Oh one thing, if you do the DDU thing. remove all monitors from the GPU apart from main display, until drivers is installed

Alright, ram might have gone bad though, it happens, but try the DDU and fast boot thing and see if it helps

If you plug in the old GPU, does it work? Also did you clear CMOS before installing the new card? A side note, if you removed all cables and ram, make sure ram is seated in slot A2 and B2 and check cables as @Average Nerd said.